159 citations · 245 across the 12 of their papers we have counts for
12 papers
Extreme AGN Variability in WISE: Powerful Flares and Candidate Tidal Disruption Events in AGN
Satya Teja Anuraag Upadhyayula, Daniel Stern, Kishalay De +7
We present first results from a systematic study of extreme mid-infrared variability of active galaxies across the -year baseline of the Wide-field Infrared Survey Explorer (W…
An Extremely Luminous Flare Recorded from a Supermassive Black Hole
Matthew J. Graham, Barry McKernan, K. E. Saavik Ford +17
Since their discovery more than 60 years ago, accreting supermassive black holes in active galactic nuclei (AGN) were recognized as highly variable sources, requiring an extremely…
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion
Sarang Shah, Jonathan P. Marshall, Carlos del Burgo +12
ASASSN-24fw is a main-sequence F-type star that experienced a rapid and long-lasting dimming event beginning in late 2024 and continuing until mid 2025. Its pre-dimming spectral en…
Identifying tidal disruption events among radio transient galaxies
M. Kunert-Bajraszewska, D. Kozieł-Wierzbowska, D. Stern +4
We present the optical and infrared properties of a sample of 24 radio transient sources discovered in the Very Large Array Sky Survey (VLASS). Previous studies of their radio emis…
Infrared-Selected Active Galactic Nuclei in the Kepler Fields
Tran Tsan, Matthew Malkan, Rick Edelson +3
We utilized the Edelson and Malkan (2012) and Stern et al. (2012) selection techniques and other methods to identify AGN candidates that were monitored during the Kepler prime and…
Searching for electromagnetic emission in an AGN from the gravitational wave binary black hole merger candidate S230922g
Tomás Cabrera, Antonella Palmese, Lei Hu +17
We carried out long-term monitoring of the LIGO/Virgo/KAGRA binary black hole (BBH) merger candidate S230922g in search of electromagnetic emission from the interaction of the merg…
Conditions for Changing-Look AGNs from Accretion Disk-Induced Tidal Disruption Events
Yihan Wang, Matthew J. Graham, K. E. Saavik Ford +3
The phenomenon of changing-look (CL) behavior in active galactic nuclei (AGN) is characterized by dramatic changes in luminosity and/or emission line profiles over relatively short…
In-plane Tidal Disruption of Stars in Disks of Active Galactic Nuclei
Taeho Ryu, Barry McKernan, Saavik Ford +4
Stars embedded in active galactic nucleus (AGN) disks or captured by them may scatter onto the supermassive black hole (SMBH), leading to a tidal disruption event (TDE). Using the…
Establishing accretion flares from massive black holes as a source of high-energy neutrinos
Sjoert van Velzen, Robert Stein, Marat Gilfanov +26
The origin of cosmic high-energy neutrinos remains largely unexplained. For high-energy neutrino alerts from IceCube, a coincidence with time-variable emission has been seen for th…
Ram-pressure stripping of a kicked Hill sphere: Prompt electromagnetic emission from the merger of stellar mass black holes in an AGN accretion disk
B. McKernan, K. E. S. Ford, I. Bartos +7
Accretion disks around supermassive black holes (SMBH) are promising sites for stellar mass black hole (BH) mergers due to mass segregation and merger acceleration by disk gas torq…
A highly magnified gravitationally lensed red quasar at z = 2.5 with significant flux anomaly: Uncovering a missing population
E. Glikman, C. E. Rusu, S. G. Djorgovski +5
We present the discovery of a gravitationally lensed dust-reddened QSO at discovered in a survey for red QSOs by infrared selection. imaging in t…
Coronal properties of the luminous radio-quiet quasar QSO B2202209
E. S. Kammoun, G. Risaliti, D. Stern +8
We present an analysis of the joint - and observations of the radio-quiet quasar QSO B2202209. Using an optical observation from the Hale Telescope at the…